Samsung LT15M23C Service Manual page 8

2 Product Specifications
2-3 Timing Chart
This section of the service manual describes the timing that the computer industry recognizes as standard for
computer-generated video signals.
Mode
LT15M23C
VGA
LT15M23C
SVGA LT15M23C
LT15M23C
XGA
Separate Sync
A : Line time total
C : Back porch
E : Front porch
2-4
Table 2-1 Timing Chart
Horizontal
Resolution
Frequency(kHz)
720X400
31.496
640X480
31.496
640X480
37.500
800X600
46.875
800X600
37.879
1024X768
48.363
1024X768
60.023
B : Horizontal sync width
D : Active time
Pixel
Vertical
Clock
Frequency(Hz)
Frequency(MHz)
70.087 28.322
59.940 25.175
75.000 31.500
75.000 49.500
60.317 40.000
60.004 65.000
75.029 78.750
H/V Composite Sync
Sync-on-Green
O : Frame time total
Q : Back porch
S : Front porch
Sync
Polarity(H/V)
- / +
- / -
- / -
+ / +
+ / +
- / -
+ / +
P : Vertical sync width
R : Active time
LT15M23C